Some people love it, some people hate it, and some people fall somewhere in between.
And, looking at the threads (since that's what you're questioning) people just enjoy discussing the little bits of it (be it character choices, complaining about advancement of plot, or just sharing the chuckle they had over a joke).
To use as an example (*see note below), on these very same boards you have people that love a particular D&D edition, people that hate a particular edition, and others that fall somewhere in the spectrum in between. Yet every time there is an update on WotC's site there are usually 2-3 threads opened up for it (sometimes in "general" sometimes in the specific edition forum, and sometimes a double-up in either of those forums). And you have people jumping in to discuss the details of it. But you still have the other people who don't like that particular edition so they probably sit back and "don't get it" either when people open multiple threads about it minutes after it gets posted online or why people discuss it for page after page.
*Reference to editions used solely for illustrative purposes and not meant in any way to make this a discussion about edition preferences.
Same is true for several TV shows that get separate threads in the Media forum every week.
So, really, just some people like it, some people don't. Some people like to discuss it (good or bad) and some people don't. And a person can fall anywhere in that matrix.
Personally? I enjoy the strip. I don't always feel the need to discuss it unless I happen across a thread for it and such.
I do also see threads started whenever there is a D&D reference in other comic strips (like Fox Trot) it's just that such things happen with less frequency than in OotS which is a constant D&D reference.